How old is the oldest known mineral, a zircon crystal, on Earth?
A) 13.7 billion years old
B) 4.6 billion years old
C) 4.4 billion years old
D) 2.657 billion years old
Answer: C
You might also like to view...
The shape of a water table is determined by the topography of the surface of the land above it. The high part of a water table separating parts sloping in opposite directions is called the
A. hydraulic gradient. B. aquifer. C. groundwater divide.
A linear ridge of sediment attached to land at one end might be called a ________.
A) bay barrier B) tombolo C) barrier island D) bay-mouth bar
The text suggests that reducing automobile use could be done, but that it would be difficult. One way that such an approach could occur would be to introduce "full-cost pricing" by levying a tax on gasoline. Explain why this approach would be difficult in the United States.
What will be an ideal response?
Competitive inhibition can be explained by which of the following models?
A) the induced fit model B) the lock and key model C) both a and b D) neither a nor b